I have a 40S&W P2000 LEM.
For range work, the LEM is not my favorite. The pull is very long and the break comes very late. I just took a box of 250 UMC cartridges to the range and the *best* group I could get at 25 yards from a rest was 3 7/8 inches. The ammo is pretty cheap and the recoil from the 40S&W doesn't help with small groups, but that long trigger pull with the too late break probably added at least 1 1/2 inches to my group (my guess). On the same day, my .22 buckmark grouped 1 1/4 inch.
That said, for self defense at reasonable ranges (25 yards is a bit long...), the long trigger pull will prevent accidental discharges as you really have to want to pull that trigger to make the gun go off. I know, "keep you trigger finger out of the guard and you won't have an issue," but that finger sure likes to "check" to make sure the trigger is there, especially when you are under stress. So, for carry, the trigger is great and does add an extra layer of safety like it was designed to do.
Some folks can get very use to the longer pull and become quite accurate. It just takes work and time.
I don't like the decocker on the P2000 series. However, when the HK45 comes out with the 1911 style safety/decocker, I will not get the LEM as the DA/SA should help me get tighter groups which I prefer even on my carry guns.
Massad Ayoob, an author and trainer who I respect, seems to prefer the DAO design as it adds safety and keeps liability down. I prefer a lighter pull because I am not inclined to spend the extra money on the ammunition I would need to get use to the longer, harder pull. Everyone has their opinion.